validate_new_state.patch

validate_new_state.patch

diff --git a/lib/galaxy/tools/__init__.py b/lib/galaxy/tools/__init__.py
index fe0cc04..a32f571 100755
--- a/lib/galaxy/tools/__init__.py
+++ b/lib/galaxy/tools/__init__.py
@@ -1950,9 +1950,10 @@ class Tool( object, Dictifiable ):
                 if not self.display_interface:
                     return self.__no_display_interface_response()
                 if len(incoming):
-                    self.update_state( trans, self.inputs_by_page[state.page], state.inputs, incoming, old_errors=old_errors or {}, source=source )
-                return "tool_form.mako", dict( errors={}, tool_state=state, param_values={}, incoming={} )
-
+                    errors = self.update_state( trans, self.inputs_by_page[state.page], state.inputs, incoming, old_errors=old_errors or {}, source=source )
+                else:
+                    errors, _ = self.__check_param_values( trans, state.inputs, state, old_errors, process_state, history=history, source=source )
+                return "tool_form.mako", dict( errors=errors, tool_state=state, param_values={}, incoming={} )
         all_errors = []
         all_params = []
         for expanded_incoming, expanded_state in zip(expanded_incomings, all_states):